Victoria homicide squad detectives say a body found at a house in Melbourne's west at the weekend is that of missing woman Sarah Cafferkey.

Ms Cafferkey, 22, left her Bacchus Marsh home on November 9 and was seen at a friend's house nearby the day after that.

Her abandoned car was found on Owen Street in Maribyrnong on Thursday night.

In the early hours of Sunday morning officers carried out a search warrant at a house in Point Cook and found the body of a woman.

Late yesterday afternoon police issued a statement saying detectives have formally identified the remains and are that of Ms Cafferkey.

Earlier, the head of the homicide squad, Detective Inspector Michael Roberts, said police were making a number of inquiries, including threats made on Ms Cafferkey's Facebook page in the lead-up to her disappearance.